极地研究

极地研究 ›› 2002, Vol. 13 ›› Issue (2-English): 89-102.

• 目次 •    下一篇

Volcanic geology of Admiralty Bay, King George Island, Antarctica

 Xing Guangfu, Wang Dezi, Jin Qingmin, Shen Weizhou and Tao Kuiyuan   

  1. Nanjing Institute of Geology and Mineral Resources, Nanjing 210016, China
  • 出版日期:1952-06-30 发布日期:1952-06-30
  • 通讯作者: Xing Guangfu

Volcanic geology of Admiralty Bay, King George Island, Ant-arctica

 Xing Guangfu, Wang Dezi, Jin Qingmin, Shen Weizhou and Tao Kuiyuan   

  1. Nanjing Institute of Geology and Mineral Resources, Nanjing 210016, China
  • Online:1952-06-30 Published:1952-06-30
  • Contact: Xing Guangfu

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摘要：

At Admiralty Bay of central King George Island, Keller Peninsula, Ull-man Spur and Point Hennequin are main Tertiary volcanic terranes. Field investigation and isotopic datings indicate that, there occurred three periods of eruptions ( three volcanic cycles) and accompanying N-toward migration of the volcanic center on Keller Peninsula. After the second period of eruptions, the crater collapsed and a cal-dera was formed, then later eruptions were limited at the northern end of the peninsula and finally migrated to Ullman Spur. Thus Keller Peninsula is a revived caldera, and its volcanism migrated toward E with time. Point Hennequin volcanism happened more or less simultaneously with the above two areas, but has no clear relation in chemical evolution with them, frequently it belongs to another independent volcanic center.

关键词: caldera, temporal-spatial evolution, Tertiary volcanism, Admiralty Bay, King George Island

Abstract:

At Admiralty Bay of central King George Island, Keller Peninsula, Ull-man Spur and Point Hennequin are main Tertiary volcanic terranes. Field investigation and isotopic datings indicate that, there occurred three periods of eruptions ( three volcanic cycles) and accompanying N-toward migration of the volcanic center on Keller Peninsula. After the second period of eruptions, the crater collapsed and a cal-dera was formed, then later eruptions were limited at the northern end of the peninsula and finally migrated to Ullman Spur. Thus Keller Peninsula is a revived caldera, and its volcanism migrated toward E with time. Point Hennequin volcanism happened more or less simultaneously with the above two areas, but has no clear relation in chemical evolution with them, frequently it belongs to another independent volcanic center.

Key words: caldera, temporal-spatial evolution, Tertiary volcanism, Admiralty Bay, King George Island